This is a very good question. We know from studies on the learning behaviour of humans that peak learning performance occurs around 45 minutes into the flight and retention still occurs after this for around 15 minutes.  This is why you will find the time in the air is generally between 45 to 75 minutes depending on how much you are learning in that particular lesson. In the early phases of training, you are learning a LOT! The learning rate is high and cognitive overload is reached earlier in the flight. This sounds intense I know, but that’s what our instructors are trained to do. We’ll tailor the training to you on that particular day. As you advance through the syllabus, some training elements will require less of your cognitive capacity, allowing you to spend more time in the air completing that specific lesson while still learning new skills.